Add new isNotExistPattern for iptables used in Android

[kxxt]

# /system/bin/iptables -t filter -D INPUT -j not-exist
iptables v1.8.10 (legacy): Couldn't find target `not-exist'

Try `iptables -h' or 'iptables --help' for more information.

Link: https://cs.android.com/android/platform/superproject/main/+/main:external/iptables/libxtables/xtables.c;l=989